Patent US4247250A successfully refreshed from Google Patents.
US4247250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabricated pump casing
Assignee: Allis Chalmers Pump Inc
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Filing: 1979-09-04
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Granted: 1981-01-27
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Expires: 1999-09-04
Abstract
Abstract A fabricated split pump casing is disclosed in which the suction chamber and discharge chamber are both on the same side of the casing section. The volute is fabricated from a plurality of sections with the minor section of the volute being located within the suction chamber thereby providing maximum suction chamber area.
Inventors
- 👤 Bruce R. Lipe
- 👤 Robert J. Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:06
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
275 words
A fabricated split casing for a pump; a first casing section fabricated from sheet steel and defining a suction chamber having an entrance opening for fluid and a discharge chamber having a discharge opening for fluid; a first casing section flange means fabricated from sheet steel to which said suction chamber and said discharge chamber are welded; a pair of spaced apart semi-circular volute rings each welded to said first casing section flange means; a first one-half section of a volute fabricated from sheet steel welded within the first casing section to said flange means, and within said suction chamber; a first semi-cylindrical bearing support welded to said suction chamber and to said first casing flange means, and extending outwardly from said suction chamber; a second casing section fabricated from sheet steel; a second casing section flange means fabricated from sheet steel complementary to said flange means associated with said first casing section for mating engagement to provide a casing parting line; a second semi-cylindrical bearing support welded to said suction chamber and to said second casing flange means, and extending outwardly from said suction chamber; a pair of spaced apart semi-circular volute rings each welded to said second casing section flange means, said pairs of volute rings associated with said first and second casing section defining volute fluid entry passages when said casing sections are mated; a second one-half section of a volute fabricated from sheet steel welded to the second casing section flange means and adapted to be in communication with said one-half volute associated with said first casing section and said discharge chamber when said first and second casing sections are mated.
Claim 2
Dependent Claim
275 words
A fabricated split casing for a pump; a first casing section fabricated from sheet steel and defining a suction chamber having an entrance opening for fluid and a discharge chamber having a discharge opening for fluid; a first casing section flange means fabricated from sheet steel to which said suction chamber and said discharge chamber are welded; a pair of spaced apart semi-circular volute rings each welded to said first casing section flange means; a first one-half section of a volute fabricated from sheet steel welded within the first casing section to said flange means, and within said suction chamber; a first semi-cylindrical bearing support welded to said suction chamber and to said first casing flange means, and extending outwardly from said suction chamber; a second casing section fabricated from sheet steel; a second casing section flange means fabricated from sheet steel complementary to said flange means associated with said first casing section for mating engagement to provide a casing parting line; a second semi-cylindrical bearing support welded to said suction chamber and to said second casing flange means, and extending outwardly from said suction chamber; a pair of spaced apart semi-circular volute rings each welded to said second casing section flange means, said pairs of volute rings associated with said first and second casing section defining volute fluid entry passages when said casing sections are mated; a second one-half section of a volute fabricated from sheet steel welded to the second casing section flange means and adapted to be in communication with said one-half volute associated with said first casing section and said discharge chamber when said first and second casing sections are mated.
Claim 3
Dependent Claim
31 words
A fabricated pump casing according to claim 1 wherein the suction chamber and the discharge chamber are fabricated as separate members welded to the flange means of said first casing section.
Claim 4
Dependent Claim
28 words
A fabricated pump casing according to claim 2 wherein the suction chamber is formed as a rectangular box structure in which the small portion of the volute passes.
Claim 5
Dependent Claim
33 words
A fabricated pump casing according to claim 3 wherein said volute is fabricated from eighteen separate sections welded together, said volute sections being divided equally between the two split sections of the casing.
Claim 6
Dependent Claim
30 words
A fabricated pump casing according to claim 4 wherein the angle between each volute section is between 15°-20° with the center being located at the center of the impeller chamber.
References Cited (Backward Citations)
US632572A
Cited
US1197653A
Cited
US1462890A
Cited
GB254464A
Cited
US2611578A
Cited
CH313025A
Cited
US2994348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |